test_disable_scan_node_mt.py

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from tests.common.impala_test_suite import ImpalaTestSuite
from tests.common.skip import (SkipIfEC, SkipIfLocal, SkipIfS3, SkipIfABFS,
                               SkipIfGCS, SkipIfCOS, SkipIfADLS)
from tests.common.test_dimensions import create_kudu_dimension
from tests.common.test_dimensions import create_parquet_dimension
from tests.common.test_dimensions import create_uncompressed_text_dimension


class TestDisableHdfsScanNodeMt(ImpalaTestSuite):
  """Test disable HdfsScanNodeMt functionality."""

  @classmethod
  def get_workload(self):
    return 'functional-query'

  @classmethod
  def add_test_dimensions(cls):
    super(TestDisableHdfsScanNodeMt, cls).add_test_dimensions()
    cls.ImpalaTestMatrix.add_dimension(
        create_parquet_dimension(cls.get_workload()))

  def test_disable_scan_node_mt(self, vector):
    self.run_test_case('QueryTest/disable-scan-node-mt', vector)


class TestDisableKuduScanNodeMt(ImpalaTestSuite):
  """Test disable KuduScanNodeMt functionality."""

  @classmethod
  def get_workload(self):
    return 'functional-query'

  @classmethod
  def add_test_dimensions(cls):
    super(TestDisableKuduScanNodeMt, cls).add_test_dimensions()
    cls.ImpalaTestMatrix.add_dimension(
        create_kudu_dimension(cls.get_workload()))

  def test_disable_scan_node_mt(self, vector):
    self.run_test_case('QueryTest/disable-scan-node-mt', vector)


class TestDisableHdfsScanNodeMtWithTextFile(ImpalaTestSuite):
  """Test disable HdfsScanNodeMt with text file. We may get more instances than files 
  in some cases, test that we can execute query successfully and get right result."""

  @classmethod
  def get_workload(self):
    return 'tpch'

  @classmethod
  def add_test_dimensions(cls):
    super(TestDisableHdfsScanNodeMtWithTextFile, cls).add_test_dimensions()
    cls.ImpalaTestMatrix.add_dimension(
        create_uncompressed_text_dimension(cls.get_workload()))

  def test_disable_scan_node_mt_with_text_file(self, vector):
    query = "select count(*) from tpch.lineitem;"
    vector.get_value('exec_option')['disable_scan_node_mt'] = 1
    vector.get_value('exec_option')['mt_dop'] = 3
    results = self.execute_query(query, vector.get_value('exec_option'))
    assert results.success
    assert len(results.data) == 1
    assert int(results.data[0]) == 6001215